Machine for sanding window sashes



May 15, 1928.

S. MADSEN MACHINE FOR SANDIiiG WINDOW SASHES Original Filed Nov. s, 1921 5 s e s et May 15, 1928.

May 15, 1928. 1, 69,989-

5. MADSEN MACHINE FOR- SANDING WINDOW SASHES Original Filed Nov. 1921 5 Sheets-Sheet i5 I 1.06 10a 1 2a 59 65 a 3 60 52: Q L! 60 1003 w M 62 15 7i 7! a5 v Q 7,? I, Z9 3 a 9 .96

3% Z5 2% z .90 M -11 1/ v f" .41 11/? a I 111 114% a; l a 27 a 71 a 4 a5 44 0 f i i 9?? 8% /jfl 9 .95

May 15, 1928.

1,669,989v s. MADSEN MACHINE FOR SANDING WINDOW SASHES Original; Fild. Nov. 5. 1921 5 Sheets-Sheet 4 May 15, 1928. 1,669,989

s. MADSEN A MACHINE FOR SANDING WINDOW SASHES Original Filed, Nov. 5, 1921 Y 5 sh ets-sha 5 as May15, 1928. j

.. semi mean. or cannon, Iowa.-

jmnon'iim non sannme w'mnow sasnns. I

Application filed-November a, 1921,5er1al11'o. 512, 77. Renewed March'i29, 1928. I

, 'Tlie object of my invention is to provide a machine forautomaticall sanding win dow sashes. of; comparative y simple, durable and inex ensive construction.

A further 0 ject is to provide in a sash sanding machine having a feed chain arranged to automatically feed the sasl 'between suitable sanding rollers, improved means for driving and adjustin the rollers.

Figure is an enlarged detail sectional:

view takenon the line 6-6 of Figure 2.

Figure 7 is .a segmental and longitudinal sectional view of one of the drum supporting members.

Figure 8 is a detail view showing a portionof the mechanism for raising and'lowering the upper group of abrasive drums.

' Figure 9 1s. a vertical, longitudinal, sec- TENT 'oFFicE.

A further object is to provi e in a sash -'sanding machine means whereby both sides of the sash and one edge of the check rail may be sanded by a single operation of the machine.

. A further object is to provide in a sash sanding machine having. a series of sanding di'i1ms, iinpi'oved' means for mounting the drums whereby a maximum number of sashes may be sanded by a given set of drumsbefore replacing the abrasive material thereon.

A further object is to provide in a sash sanding machine em loying a series of sanding drums, improve means for driving the drums and for adjusting them relative to Y the sash which is to he sande 4 A further object is to provide in a sash sanding machine having a series of sand ng drums, improved means for adjustably mounting the drums relative t'o the sashupon which it operates, the said means being designed to carry a.mo tor for indepcndcntly driving each ofsaid drums, the said motorv to be so mounted that when the said means is adjusted the motor will be correspondingly adjusted to always be in an opcrativerelatiori with said drums.-

These and other objects willbe apparent to those skilled in the art tional view of myiinproved sanding ma chine.- v

My improved machine comprises a base formed'of end members10 and side members 11. Mounted upon eachiof the members 11 is a frame member 12. i

The left hand end of the frame members 12, as shown in Figure 1, is provided with slots '13, each of which is provided with a boai'ing'l i adjustably mounted in said slots by means of a set screw 15. 'The said bear- (5. ings 14 are designed'to carry a transversely arranged shaft 16. This shaft 16 is pro-. vided near each end with a sprocket 17.' The oppositeend of the frame 12 is provided with a transverse shaft 18 upon-which 80 'a re mountedsprockets 19-. Each corre sponding set of sprockets 17 and 19 is pro vided avith a chain .20. Each of the chains 20 is designed to travel in'a, channel member 21 extending in- 86 wardly from the top portion of the frame members 12. as clearly shown in Figure 3. Between the members 21 I have provided a platform 22, the top face of which is subtop runs of the chains 20. The said chains 20 are designed to carry aseries of feed bars 23, the said feed bars being arranged transversely between said chains and designed to travel over the,upper face of the platform 22. the front edge'of each of the feed bars 23 being substantially at right angles with thc said chains. The lowcr runs of the chains 20 are designed to travel in channel members 24 secured to brackets 2.) mounted on t e side members 11 ofthe base.. The channel members 24 are placed be 'tween' the members 11 so that the lower runs of the chains and feed bars will travel beneath the sanding rollers, and the mechanism for driving and supporting the same.

For driving the feed conveyor, which comprises'the bars 23 and the chains 20, I have provided a belt wheel 26. on one end invention consists in the construction, arrangement and combination of the various pa -tsofthe device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out In my claims, and illustrated in the accompanying drawings, in which: a Figure 1 is a side elevation of mylm provcd sanding machine. Figure 2.is a plan view of the same.

Figure 3 is a transverse, sectional view taken on the line 3-3 of Figure 2. v Figure 4- is an end elevation oftheright hand end of Figure 1. v 1 v Figure 5 is an enlarged-detail sectional 55 view taken on the line 5-5 of Figure 2. I

staiitially in line with the top edges of the 90 of the shaft 18. This belt wheel has a no mounted on said sha I v26 is driven from the motor 29 by means of .a belt .30. L

Rotatively mounted transversely acent to-the rear end of the base and beneath.

the shaft 18, I have provided a shaft 31, one end of which is provided witha-spr'ocket wheel 32, while the other end is provided ,,with a smaller sprocket 33. The sprocket 32 is driven from the sprocket 27 by means of a chain 34.

Rigidly secured to the oppositeend of the shaft 18 from that on which'the belt wheel 26 is m'ounted, I have provided a sprocket wheel 35 which is driven from the sprocket '33 by means ofa chain 36.

Thus it will be seen that the feed conveyor maybe continuously driven from the motor 29 at a considerably reduced speed. The feed conveyor may be started or stopped by starting or stopping the motor 29. v

Adjacent to the discharge end of the feed conveyor, I have provided a plate. 37 having grooves 38 in line with the chains 20. This plate 37 is for the purpose of receiving a sash as it is being discharged from the. feed conveyor. The channels 21 are so arranged that the-chains 20 maylie; in the bottom of the channels and permit the check a rail of a window sash to also enter th'c channels, the said channel members being provided with an upwardly extending portion 39 against which a check rail 40 01 a sash 41 may rest, as clearly shown in Figure'h. A bar 42 is provided for the inner flange member of the channels 21 which serves asa guide for the inner edge of the check rail- 40. This-bar 42 extends longitudinally with the channel members.

By this arrangement, it will be seen that the sash41 may be placed on the 1 ft hand end of the platform 22, adjacent to t e front edge of one of the feed bars 23 with' the check rail 40 within the channels 21 and between the "guides 39 and 42. I V

Thus it will be seen that the said sash may be advanced over the platform 22 and held against lateral movement by the guides,39

and 42 with the sash 41 lying flat against the platform 22.

For sanding the edge of the sash 41 and also the corresponding edge of the check rail 40, I have provided the following mecha- Secured to one of the members 11, I have provided a bracket 43 on which is mounted .a motor 44. The armature shaft of the motor 44 is operativel connected with a transversely arranged a aft 45, Figure 5. The

opposite end of the shaft 45a mounted m a bearing 46 mounted on the opposite plate 11 that to which'the bracket 43 is attached. Each end of the shaft 45 is provided with a belt pulley'47.

Secured to the top 'edge ofeach 'of the frame members 12 above theshaft 45, I'have provided a spaced set of brackets 48. The

brackets '48 and the mechanism carried thereby are alike and biit one of them will be described. The said brackets are so 10- cated that the shaft 45 and the motor '44 I will lie in a vertical plane substantially equidistant between said brackets. Each of the brackets 48 is provided with two sets of pivoted arms 49. Theiupper.

endsof each set of arms are designed-to carry a pivotall mounted bearing 50. .Ro-'

tativel'y mounte ineach set of the bearingsv 50 is a shaft 51 having a belt wheel 52. i

The belt wheels 52 are driven from the wheel 47 by means of a, belt 53, thelower run of which extends under the pulley 47,

and the upper run of which is designed to pass beneath an idler pulley 59 which is adjustable in the usual manner for the purpose of keeping a belt tight.

A thrust collar 54 is mounted on the ishaft' the innen face of the inner 51 adjacent to bearing 50. t I

Mounted on the inner end of the shaft 50, I have provided a \disc 55, the inner face. of which is provided with an abrasive material 56, the (face of said abrasive material being designed to rest adjacent to the outer edge of the sash.41'so that aslthe sash 1s moved past the .disc 55, the outer edge of 'said sash will become finished.

For adjustin the disc 55,1 have provided an arm 5 mounted to the outer end of each of the outer bearings 50. This arm 57 extends downwardly and has a set screw '58 which is screwedinto the outer end of the bracket 48. By adjustin the screw 58, the .bearings 50 may .be move inwardly or outwardly,vand thereby provide means for adjusting the depth of the cut of the abrasive 56.

In this connection it will be noted that the platform 22 is of a width greatertha'n the width of the sash, thus permitting'butione edfie ofthe sash to engage the discs 55.

y providing a set of abrasive discs at each side of the platform 22, I have provided.

means whereby half of the sash may be made to engage one set of discs while the other half may be madeto enga e the opposite set. The purposeof this w here mafter made clear. I

At the central portion of each of the frame members 12, I have provided a series of vertieal guide members 60. These guide membars are arran ed in pairs, and each pair is designed to sli ably receive a bearing member 61. Each set of corresponding bearings.

slightly less than the distance between the inner edges of the guide members 21 so that a slight longitudinal movement of the drum 63 will be permitted. a

, Mounted on the corresponding members 61 and beneath the drum 63, I have provlded atube 64'. This tube is shown in section in Figure'7, and is rigidly mounted in the bear- I ing members 61.

- The bottom'portion of the tube 64 is provided with op'eningsf65 which are imme-' diately above openings 66 in the bottom portion of-the member 61. Each corresponding set of openings 65 and 66 is designed to receive a in 67, the lower end of which; rests,

on. the ottom'of the groove in'which the member 61' is mounted. The upper ends of the pins 67 are each provided with a beveled top ort'ion.

Shdably mounted within the tube 64 near theright hand end, as'shown in Figure 7,.

I have provided'a block 68 having its'lower face beveled and designedto rest upon the ri ht hand pin 67.

lidably mounted within the tube 64 above I the left hand pin 67, I has? provided a block 69 similar to" the block This block 69 is provided with a tubular. sleeve 70, the outer end oflwhich isscrew 1 threaded and designed to receive a sleeve 71.

The sleeve 71 is provided with a hand wheel 72 for rotatin the same. e v

The outer ace of the sleeve 71 is screw] threaded in the o posite direction from the inner face and esigne'd to coact with a screw threaded portion 73 in the left hand end'ofthetube64.- j I The left hand end of the tube 70 is provided with an internalscrew threaded per-- tion 74 in which is mounted a sleeve 7 5." The ingr-the said sleeve within the tube 70.

v screw threaded end of arod 78. The outer outer end' of the sleeve 75,is provided with a head .76 whic'h'js for the purpose of rotathe 'sleeve 75 is provided with a screw threaded opening77 threaded in the oppo-c site direction from the outer-face of said sleeve, and designed to receive the left hand- 'epd, of the rod 78 is-provided with a ,lock

. nut 79. The opposite end of said rod 78 is' -'provided with a screw threaded-portion 81' mounted in the block 68, the oute'rend of the portion 81 'bei provided with a nut 82 for thepurpose of ocking the block in position.

By this arrangement, it will be seen that if the hand wheel 72 is rotated, it will move "longitudinally-either to. the left or right de moved to the right or Ieftandwith it the rod, 78 throu h the sleeve 7 5, thereby providing meansw 'ereby the blocks68 and 69 will be moved simultaneously'and longitudinally within the tube, and the fsaidtube elevated pending on which direction it is rotated relative to the tube 64. The sleeve Wlll be or lowered upon the pins 67, thereby-provid ing means for raising or lowering the drum 63 through-the members 61.

Figure3, without. raising or lowering the opposite .end for the purpose of altnihg the top face of the drum, this. I can accomplish by loosening the nut 79 and rotating the' .head' 76, which in turn will rotatethe sleeve 7 When it=is de. red to raise (ir lower theright hand end of the drum63, as sh own m 75 within the tube 70 and. about the left hand end of the rod 78, the outer portion and the inner portion of the sleeve 75 being threaded in the opposite direction will cause the .rod 78 to. be' moved lon itudinally through the block-69 and the hi e-70, a-nd the block 68 to be moved longitudinally and the right hand end of'the said tube either raised or lowered. After it has been raised or lowered a desired amount, the, nut 79 ma then be tightened and the'adju-stment pos .tively secured. 1

If it is desired to adjust the left hand'end ofv the drum 63, the wheel 72 rotated as before described, which will cause both of the blocks 68Ia'nd 69 to be moved' andithe I drum' 63 elevated or lowered,- after which the adjustment of-Jthe' right hand end may then be made asebefore described.

This providesfmeans for accurately aliIimg the topfac e. of the drum with the top face of, the platform 22, so that the drum 63 may be made to cut any desired depth.

For rotating the drum 63, I have provided aimotorn83fmounted on a bracket 84 which is. mounted on. an'-'-eccentri'c sleeve 85' near the: left hand end" of the tube 64. The

I bracket84 is provided with an inwardly extending arm 86, which 'is loosely bolted to themember 61 so that a slight .llpand down.- movement bf, the member 84 maybe permitted, and-yet thesaid member may be held against rotation upon the sleeve '85.

1H6 The bracket 86- is secured to the. member 61 by means of'aset scre\v.-87 so" arranged that lateral movement .of the member 86 ,7

ma also be provided. he left hand endv v f the-shaft'62 is pro; v ded withan armature or rotor 88 which'is rigidly secured to the 'shaft. The said. armature is capable of moving longitudinallyjm a field or stator 89 so as to permit longitudinal movement of the drum 63.

The screw 87 andv the sleeve 85providemeans whereby the'fi'eld may, be-alined with .the armature. This provides. means where ,by the drum -63 may. be positively driven without the use of belts or gears, and. wl 1ere-' member 61 by means of a pin 99.

by the said drum'may be easily and quickl e evated orlowered without interfering wit the alinement of the motor. J

' For producing longitudinal movement of the shaft 62, I have provided a f shaft 90 rotatively'mounted adjacent to the right hand base member 11, as shown in Figures?) and 4. This shaft is secured in 'position by means of brackets 91, and has its front end the shaft 31.

1 a ring103.

97, thecentral portion of'which is pivoted to the outerend of a link 98 the inner end of said link beingqpivoted to the hearing The right hand end of the shaft 62 is provided with a-sleeve 100 which is secured 0'11 the'shaft by means of a nut 101 and a washer 102. The said sleeve 100 is designed to carry Secured tothe-upper end of the member 97, I have provided a bifurcated arm 104,

i the upper end of which is pivot-ally connected'to the ring 103. V

The member 104 is secured to the upperend of the arm 97 by means of a pivot 105.

i and abolt 106 mounted in a slot 107 1 'By this arrangement, it will beseen that when it is desired. toxadjust the reciprocating pathof. the drum 63 laterally with themove- I ,meht of the sash through themachine, the

operator may loosen the nut 106 and swing the 'upper end of the/arm 104 either to theright or left, then looking the said nut.- The drum 63 may then be reciprocated near one side. or the other of the conveyor member. The object ofthis is to oi'er'come'the diflieultywhich is experienced by'the ends of the .dowel ins of the sash engaging the'sand paper an wearing. grooves therein. The ma -i rocating movement; of thedrum' has a ten ency to widen the path formed byth e ends of the dowel insengaging the abrasive material of the -rum,'and'thereby lengthen the life of the abrasive material. Theisash bars v which extend longitudinallywith the move .ment of the sash through the machine also have a tendency to wear grooves in the abra-.

'sive material due to the fact that they engagethe abrasive material a' greater length k of time thanthe transversely arrangcdbms.

' 1 After the abrasive material has been-worn through, the drum; may be. then adjusted a slight distancejlongitudinally and the'dowel pins made to inscribe. 'a diiierent path about the surface; of the abrasive drums.

. member 97 is caused to oscillate by the rota- The ' tion of the shaft 90 and the eccentric 94 withjn'the block 95.

drums 63 are arranged at a slight angle relative to the transverse line through the machine, as clearly shown in Figure 2.

This provides means wherebythe sash is carried more uniformly through the machine and vibration eliminated that would othen -wise be caused by the cross members of the sash successively and abruptly engaging the abrasive roller I p For-'yieldingly holding the sash agaln st upward movement when engaged by the upper face-of the drum 113, I have provided a series of-spring arms 108 which are secured to-a transversely arranged bar 108. For this purpose, yieldably mounted rollers may also be used-if so desired. I have preferably provided three of these drums 63 designed to engage the under surface of the sash.

' For sanding the upper surface of thesash, 5

Irhave proy'ided the following mechanism: Adjacent to the right hand end of each of the members 12, Figure 1, I have provided a frame member 110. Adjacent to'the right hand end of each. of the-members 110 is a stationary frame member 111. Each of the frame members 110 is mounted to move vertically between the members 12 and 111.

. Each of the members 110 is provided with I a series of vertieallyadjustable members 112 similar to the members 61, and designed to carry abrasive drums 113 similar to the L drums 63and mounted inthe same manner and by similar mechanism with the exception that the drums 1-13 aredesigned to engage the 'u per face of the sash instead'of the lower ace, each of the drums113 being provided with an independently driven motor 114: similar to the motors 83.

edge of the members 11. Each of the screws 115 is screwthread'ed into'said base member a d is which is keyed thereonand hasithe upper end. of its. hub designed to enga e the lower edge of the frame in su'c a manner I that as the sprockets 116 are rotated, the frame members 110 will be raised or lowered.-

.- A11 of-the sprockets 116 are designed to re .ceive a chain 117 so that as. one of the sprockets 116 is operated, all will'be operated simultaneous thereby- Providing means I rums 113 maybe simultaneous whereby the dy raised or lowered;

On the base 'memberilhl have provided beveled @ears 118*011-"5theshaft1 90, Figures '2 and 8, which. are -slidably mounted and Each of theme'mbersliO is mounted on a air .of ja'ckscrews which" havev their ase members rigidly mounted on the .upper provided-with'a sprocket wheel 116 designed to mesh with a beveled gear 119 .-mounted on one end of a transverse shaft 120, the beveled gears 118 being mounted on a 'sleeve'q121 which is feathered to the shaft 90 and operated by means of a lever 122'. so that as the sleeve 121 is'mo'ved in either d1r0t10l1,'t-h6 gear 119 will be en-' be operated and the frame 110 elevated or,

lowered as above described.

Thus it will be seen that, the drums 113 may be easily and quickly adjusted to sash of difl'erent thickness, and each drum may be individually adjusted to the sash by the mechanism before described for the drums 63.

In the practical operation of my machine, assuming that all of the motors are in operation, then the slats 23 would be moved longitudinally through the machine above the platform 22. The operator then places a sash'on the platform 22 in front of one of the slats 23 with the check rail within the chain groove of one of the members 21, as

clearly shown in Fi ure 6. Thenext sash is laid with the chedh rail in thegroove of the opposite member 21 so that the check rail of one sash is adjacent to one side of the machine, while" the check rail of the op posite sash is adjacent to'the opposite side of the machine.

The sash is then advanced until the check rail engages the discs55, and the edge of the sash is sanded.

The sash is then advanced under thefingcrs 108 and above the drums 63, thence carried beneath the drums 113, and then dolivered to the platform 37.

Each of the drums113 is independently operated and is moved longitudinally with its shaft. The drums 113, however, are longer than the drums 63 so as to engage the upper face of the longitudinal rails of the sash while the drums 63 engage all the longitudinal rails of the sash except the check rail, as clearly shown in Figure 3, the

drums 113 being shown in dotted lines in said figure.

By this arrangement, it will be seen that a sash may be placed in the machine at one end, and come out completely sanded at the opposite end, and it provides means whereby the maximum amount of wear'may be obtained from the abrasive material of the drum, due to the fact that the drums are adapted to be shifted in different positions whenever desired, or whenever the abrasive material has been worn. through by dowel pins or by the longitudiiialbars of the sash.

. I claim as my lnvention:

1. Ina sanding machine, a frame, a stock'- carrying platform, a second frame adjustably mounted in the first said frame, said second frame bein designed to carry a; shaft arranged substantially transversely with said platform, means for adjusting the said second frame to move the abrasive drum toward said platform, a motor frame supported on said second frame, a motor armature on one end of said shaft designed to be operatively mounted within said motor frame, and means for imparting axial reciprocation to said shaft and to said armature.

2. In a sanding machine, a frame, a stockcarrying platform, a second frame adjustably mounted in the first said frame,"said second frame being designed to carry a shaft arranged substantially transversely with said platform, means for adjusting the said second frame to move the abrasive drum toward said platform, a motor frame supported on sai second frame, a motor armature .on one'end of said shaft designed to be operatively mounted within said motor frame, means for adjusting said motor frame relative to said second frame and to said armature for the purpose ofcenterin the armature and the said motor frame, an means for imparting axial reciprocation to said shaft and to sald armature. 

